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Add allowed and denied peer to turnserver.conf #233
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If the TURN server is used by multiple BBB servers? |
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And the blind shall see ;-) This is a good pull request and makes the internet a lot safer! |
Following [1] and [2] the TURN-Server can be used to access the network behind the TURN-Server or the server can be abused to relay attacks in the internet. To workaround those problems `denied-peer-ip` and `allowed-peer-ip` setting should be used. [1] https://www.rtcsec.com/post/2020/04/how-we-abused-slacks-turn-servers-to-gain-access-to-internal-services/ [2] https://www.rtcsec.com/post/2021/01/details-about-cve-2020-26262-bypass-of-coturns-default-access-control-protection/
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we run this setup in production since many months (can't remember since when). I'd recommend everyone to protect their turn servers using this setting. |
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Following [1] and [2] the TURN-Server can be used to access the network behind the TURN-Server or the server can be abused to relay attacks in the internet. To workaround those problems
denied-peer-ipandallowed-peer-ipsetting should be used.[1] https://www.rtcsec.com/post/2020/04/how-we-abused-slacks-turn-servers-to-gain-access-to-internal-services/
[2] https://www.rtcsec.com/post/2021/01/details-about-cve-2020-26262-bypass-of-coturns-default-access-control-protection/